/* 头部和导航栏的css */
* {
    padding: 0;
    margin: 0;
}

ul {
    list-style: none;
}

/* 版心区域 */
.center {
    width: 1350px;
    height: 100%;
    margin: 0 auto;
}

/* 头部区域 */
.top {
    width: 100%;
    height: 50px;
}

/* 头部区域的右侧 */
.topright {
    width: 300px;
    height: 50px;
    float: right;
    margin-right: 70px;
    font-size: 14px;
    color: #999;
    line-height: 50px;
    display: flex;
}

a {
    text-decoration: none;
}

.top .topright a {
    text-decoration: none;
    color: #999;
}

/* 当鼠标滑过颜色变重,有下划线 */
.topright .topbar a:hover {
    border-bottom: 1px solid #999;
}

.top .topright .iconfont {
    margin-left: 20px;
}

.top a:hover {
    font-weight: 700;

}

/* 返回顶部区域 */
.reT {
    width: 60px;
    height: 275px;
    background-color: gray;
    opacity: 0.5;
    position: fixed;
    right: 50px;
    z-index: 1;
    top: 50%;
    margin-top: -135px;
    border-radius: 50px;
}

.reT .iconfont {
    font-size: 30px;
    color: white;
}

.reT a {
    color: white;
    font-size: 12px;
    display: block;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-bottom: 2px solid white;
}

.reT .ser a {
    border-bottom: 0;
}

.reT .reTOP {
    width: 60px;
    height: 91px;
    border-radius: 50px 50px 0 0;
}

.reT .Cart {
    width: 60px;
    height: 91px;
}

.reT .ser {
    width: 60px;
    height: 91px;
    border-radius: 0 0 50px 50px;
}

/* 导航区域 */
.nav {
    width: 100%;
    height: 100px;
    background-color: white;
}

.nav .center {
    display: flex;
}

.nav .logo {
    width: 205px;
    height: 100px;
}

.nav .logo img {
    width: 100px;
    margin-top: 20px;
    margin-left: 50px;
}

.nav .logo a {
    color: black;
    font-size: 20px;
}

.nav ul li {
    float: left;
}

.nav ul li a {
    color: black;
    display: block;
    width: 90px;
    line-height: 100px;
    font-weight: 700;
    margin: 0 5px;
    text-align: center;
}

.nav ul li:hover a {
    display: block;
    height: 95px;
    border-bottom: 5px solid red;
}

/* 二级下拉菜单 */
.nav .nav_list {
    position: relative;
}

.nav .nav_list .nav_wenzi {
    width: 2000px;
    min-height: 400px;
    border: 1px black solid;
    position: absolute;
    top: 100px;
    left: 50%;
    margin-left: -675px;
    background: #fff;
    display: none;
    z-index: 1;

}

.nav_list:hover .nav_wenzi {
    display: block;
    display: flex;
    justify-content: center;

}

.nav .nav_list .nav_wenzi .nav_all {
    width: 200px;
    min-height: 400px;
    border-right: 1px solid gray;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.nav .nav_all li {
    padding: 10px 0;
}

.zhengfang {
    width: 210px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid gray;
    margin: 29px;
    display: flex;
}

.zhengfang .xiaozheng {
    width: 50px;
    height: 30px;
    margin-top: 5px;
    border-right: 1px solid gray;
}

.zhengfang .icon-sousuo {
    font-size: 20px;
    line-height: 30px;
    margin-left: 10px;
    color: black;
}

.zhengfang input {
    width: 150px;
    height: 30px;
    margin-top: 5px;
    margin-left: 10px;
    border: 0;
    outline: none;
    background-color: rgba(0, 0, 0, 0);
}

